Two senior party leaders indicated that Tomar could face expulsion from AAP as there is a feeling in the top leadership that he had "misled" them on the issue.
"We have zero tolerance on such issues. He was given a fair opportunity but the general feeling is that he tried to mislead the party. There's a possibility of his expulsion from the party," a senior leader said.
The body comprises former IPS officer N Dilip Kumar, former DG CISF Rakesh Sinha and educationist S P Verma.
"Arvind (Kejriwal) is very upset. He (Tomar) was given a fair opportunity. He produced certain documents and RTIs and tried convincing everybody. But then you cannot keep lying," the leader added.
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Party sources said when the issue of his graduation degree cropped up, AAP also found out that the matter was a bit "fishy".
"When we asked him to come clean on the whole issue, he said it was a political conspiracy against him. We saw his degrees and they appeared to be genuine. We also gave him the benefit of doubt.
The party is also understood to be contemplating withdrawing the services of its legal cell head HS Phoolka as Tomar's lawyer.
49-year-old Tomar, MLA from Delhi's Trinagar constituency and a first-time minister, was remanded in four-day police custody by a Delhi court on Tuesday in the fake degree case.